How to fire the moved event after sorting using UIkit?

Question

UIkit

How to fire the moved event after sorting using UIkit?
in the manual it is written that it is necessary to use initialization:
UIkit.sortable(element, options);
for example there is:

<ul id="elms" class="uk-grid-small uk-child-width-1-2 [email protected] uk-text-center" uk-sortable="handle: .uk-card" uk-grid>
    <li>
        <div class="uk-card uk-card-default uk-card-body">Item 1</div>
    </li>
    <li>
        <div class="uk-card uk-card-default uk-card-body">Item 2</div>
    </li>
</ul>

after

UIkit.sortable('#elms', {
   moved: function(){
         alert(1);
   }
});

well, nothing works, with F5 it just fires alert once and that's it, tell me what I'm doing wrong?